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Brass Locks, Doorknobs, and Hardware
Lead is often a component of the brass (and bronze) alloys
that make up so many items of common household hardware like
doorknobs, hinges, locks, and other fixtures. This is
primarily for ease of machining: lead makes brass easier to
cut and mold, so it is a popular (but not essential) component
of these materials. Lead content in machined brasses can reach
8%.
Health Hazards: Lead can be transferred to hands
when you touch these items, then hand-to-mouth contact brings
it into the body.
How to Avoid or Minimize Exposure:
A home lead test kit will tell you if lead is present in
brass hardware. If it is,
and it's not impractical to replace the item, do so with one
that doesn't contain lead, such as lead-free brass alloy, or
use a nickel-plated or stainless steel item. If the item
remains in your house, wash your hands after touching it, as
the lead can be present on the surface. This can be a
substantial source of cumulative exposure. Keep the leaded
brass products away from children. Note that some brass
products have a lacquer coating for protection, but it wears
off over time. Test such items later if the lacquer seems to
be wearing off.
Links to Related Resources
ERF
Chemical Fact Sheet for Lead
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